REMOVE

1. Nitrate negatives
2. negative
3. Artists' studios.
4. Portrait photographs
5. Genthe, Arnold
6. 1920

WHAT

1. Artists' studios. (1)
2. Artists. (1)
3. Nitrate negatives (1)
4. Photographs (1)
5. Portrait photographs (1)

WHO

1. Genthe, Arnold (1)
2. Library of Congress Print … (1)

WHEN

1. 1869-1942 (1)
2. 1942 (1)
3. between 1920 and 1942 (1)